Patents by Inventor Kunihiro Niigata

Kunihiro Niigata has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5643931
    Abstract: A bisoxadiazolidine dione derivative represented by the following general formula (I) or a pharmaceutically acceptable salt thereof, which is useful as an insulin sensitivity-increasing drug, and a pharmaceutical composition thereof. ##STR1## each represents a phenylene groupL:(1) an oxygen,(2) a ##STR2## (3) a --S(O).sub.n --, (4) a --CO--,(5) a ##STR3## (6) an alkylene group or an alkenylene group which may respectively be interrupted with an oxygen atom and/or a sulfur atom.
    Type: Grant
    Filed: October 26, 1995
    Date of Patent: July 1, 1997
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kunihiro Niigata, Takumi Takahashi, Tatsuya Maruyama, Takayuki Suzuki, Kyoichi Maeno, Kenichi Onda, Toru Kontani, Osamu Noshiro, Reiko Koike, Akiyoshi Shimaya, Jun Irie
  • Patent number: 5508296
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: April 16, 1996
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kunihiro Niigata, Takumi Takahashi, Takashi Yoneda, Osamu Noshiro, Reiko Koike, Akiyoshi Shimaya
  • Patent number: 5453514
    Abstract: A Maillard reaction inhibitor containing, as an active ingredient, an amidinoheterocyclic derivative or its pharmaceutically acceptable salt, which is useful for the prevention and/or cure of various complications of diabetes and maturity-onset disorders. The amidinoheterocyclic derivatives are also useful as Maillard reaction inhibitors for cosmetics, external endermic medicines, foods, drinks, luxury grocery items and functional foods.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: September 26, 1995
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kunihiro Niigata, Tatsuya Maruyama, Hisataka Shikama, Toshiyuki Takasu, Masako Umeda, Eiko Hirasaki, Satoshi Hayashibe, Takenori Kimura
  • Patent number: 5447958
    Abstract: Pharmaceutical compositions are provided for the treatment of disorders in a subject, such as hypertension, congestive heart failure, angina pectoris, lower urinary tract dysfunction and prostatic hypertrophy. The compositions when administered to a subject produce an .alpha.-adrenergic blocking action and contain as an active ingredient sulfamoyl-substituted phenethylamine derivatives, such as optically active 5-2-[ 2-(2-ethoxyphenoxy)ethylamino] -2-methylethyl-2-methoxybenzenesulfonamide 2-methoxybenzenesulfonamide, and a pharmaceutically acceptable carrier.
    Type: Grant
    Filed: September 28, 1994
    Date of Patent: September 5, 1995
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kunihiro Niigata, Takashi Fujikura
  • Patent number: 5391825
    Abstract: Pharmaceutical compositions are provided for the treatment of disorders in a subject, such as hypertension, congestive heart failure, angina pectoris, lower urinary tract dysfunction and prostatic hypertrophy. The compositions when administered to a subject produce an .alpha.-adrenergic blocking action and contain as an active ingredient sulfamoyl-substituted phenethylamine derivatives, such as optically active 5-2-[2-(2-ethoxyphenoxy)ethylamino]-2-methylethyl-2-methoxybenzenesulfonam ide, and a pharmaceutically acceptable carrier.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: February 21, 1995
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kunihiro Niigata, Takashi Fujikura
  • Patent number: 5198587
    Abstract: Phenethylamine derivatives shown by the general formula ##STR1## wherein Ro represents a lower alkyl group; R.sub.1 represents a lower alkyl group or a lower alkoxy group; R.sub.2 represents hydrogen atom or a hydroxyl group; R.sub.3 and R.sub.4 each represents hydrogen atom or a lower alkyl group; R.sub.5 represents hydrogen atom or a lower alkoxy group; X represents oxygen atom or a methylene group; m is an integer of 1-3; and n is an integer of 0-2 and the acid addition salts thereof.These compounds exhibit a strong .alpha.-adrenergic blocking action and are useful as an antihypertensive agent.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: March 30, 1993
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kazuo Imai, Kunihiro Niigata, Takashi Fujikura, Shinichi Hashimoto, Toichi Takenaka, Kazuo Honda
  • Patent number: 5063246
    Abstract: Phenethylamine derivatives shown by the general formula ##STR1## wherein Ro represents a lower alkyl group; R.sub.1 represents a lower alkyl group or a lower alkoxy group, R.sub.2 represents hydrogen atom or a hydroxyl group; R.sub.3 and R.sub.4 each represents hydrogen atom or a lower alkyl group; R.sub.5 represents hydrogen atom or a lower alkoxy group; X represents oxygen atom or a methylene group; m is an integer of 1-3; and n is an integer of 0-2and the acid addition salts thereof.These compounds exhibit a strong .alpha.-adrenergic blocking action and are useful as an antihypertensive agent.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: November 5, 1991
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kazuo Imai, Kunihiro Niigata, Takashi Fujikura, Shinichi Hashimoto, Toichi Takenaka, Kazuo Honda
  • Patent number: 4987152
    Abstract: Novel sulfamoyl-substituted phenethylamine derivatives which exhibit .alpha.-adrenergic blocking action and are useful as an antihypertensive agent and an agent for the treatment of congestive heart failure.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: January 22, 1991
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kazuo Imai, Kunihiro Niigata, Takashi Fujikura, Shinichi Hashimoto
  • Patent number: 4973576
    Abstract: "Novel bisphosphonic acid derivatives, and a bone resorption-inhibitor and an anti-arthritis containing a bisphosphonic acid derivative represented by the formula (I): ##STR1## wherein R.sup.2 represents a hydrogen atom, an alkyl group, etc.,R.sup.2 represents a hydrogen atom or a lower alkanoyl group,R.sup.3, R.sup.4, R.sup.5 and R.sup.6 may be the same or different, each represents a hydrogen atom or lower alkyl group.
    Type: Grant
    Filed: March 9, 1988
    Date of Patent: November 27, 1990
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Shuichi Sakamoto, Makoto Takeuchi, Yasuo Isomura, Kunihiro Niigata, Tetsushi Abe, Kousei Kawamuki, Masafumi Kudou
  • Patent number: 4880841
    Abstract: Phenethylamine derivatives shown by the general formula ##STR1## wherein Ro represents a lower alkyl group; R.sub.1 represents a lower alkyl group or a lower alkoxy group; R.sub.2 represents hydrogen atom or a hydroxyl group; R.sub.3 and R.sub.4 each represents hydrogen atom or a lower alkyl group; R.sub.5 represents hydrogen atom or a lower alkoxy group; X represents oxygen atom or a methylene group; m is an integer of 1 -3; and n is an integer of 0-2 and the acid addition salts thereof.These compounds exhibit a strong .alpha.-adreneregic blocking action and are useful as an antihypertensive agent.
    Type: Grant
    Filed: February 3, 1989
    Date of Patent: November 14, 1989
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kazuo Imai, Kunihiro Niigata, Takashi Fujikura, Shinichi Hashimoto, Toichi Takenaka, Kazuo Honda
  • Patent number: 4868216
    Abstract: Novel sulfamoyl-substituted phenethylamine derivatives which exhibit .alpha.-adrenergic blocking action and are useful as an antihypertensive agent and an agent for the treatment of congestive heart failure.
    Type: Grant
    Filed: February 14, 1989
    Date of Patent: September 19, 1989
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kazuo Imai, Kunihiro Niigata, Takashi Fujikura, Shinichi Hashimoto, Toichi Takenaka
  • Patent number: 4761500
    Abstract: A novel process is provided for the preparation of optical isomers of certain sulfamoyl-substituted phenethylamine derivatives which exhibit .alpha.-adrenergic blocking agents which can be used for various treatments such as for the treatment of congestive heart failure.
    Type: Grant
    Filed: February 10, 1986
    Date of Patent: August 2, 1988
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kunihiro Niigata, Takashi Fujikura
  • Patent number: 4731478
    Abstract: A novel process is provided for the preparation of optical isomers of certain sulfamoyl-substituted phenethylamine derivatives which exhibit .alpha.-adrenergic blocking agents which can be used for various treatments such as for the treatment of congestive heart failure.
    Type: Grant
    Filed: November 27, 1985
    Date of Patent: March 15, 1988
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kunihiro Niigata, Takashi Fujikura
  • Patent number: 4703063
    Abstract: Novel sulfamoyl-substituted phenethylamine derivatives which exhibit .alpha.-adrenergic blocking action and are useful as an antihypertensive agent and an agent for the treatment of congestive heart failure.
    Type: Grant
    Filed: July 18, 1985
    Date of Patent: October 27, 1987
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kazuo Imai, Kunihiro Niigata, Takashi Fujikura, Shinichi Hashimoto, Toichi Takenaka
  • Patent number: 4558156
    Abstract: Novel sulfamoyl-substituted phenethylamine derivatives which exhibit .alpha.-adrenergic blocking action and are useful as an antihypertensive agent and an agent for the treatment of congestive heart failure.
    Type: Grant
    Filed: July 18, 1984
    Date of Patent: December 10, 1985
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kazuo Imai, Kunihiro Niigata, Takashi Fujikura, Shinichi Hashimoto, Toichi Takenaka
  • Patent number: 4464384
    Abstract: Novel 2-phenylimidazo[2,1-b]benzothiazole compounds shown by general formula I ##STR1## and the salts thereof, a process of producing the compounds, and pharmaceutical compositions containing the compounds.The compounds of this invention act on immune response, in particular, suppress a delayed type hypersensitivity reaction, and are useful as antiallergic agents, antirheumatics, therapeutic agents for autoimmune diseases, and suppressants of rejection at tissue transplantation and skin graft.
    Type: Grant
    Filed: December 14, 1982
    Date of Patent: August 7, 1984
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kiyoshi Murase, Toshiyasu Mase, Hideki Arima, Kunihiro Niigata, Kenichi Tomioka, Shinichiro Kobayashi
  • Patent number: 4373106
    Abstract: Novel sulfamoyl-substituted phenethylamine derivatives which exhibit .alpha.-adrenergic blocking action and are useful as an antihypertensive agent and an agent for the treatment of congestive heart failure.
    Type: Grant
    Filed: February 4, 1981
    Date of Patent: February 8, 1983
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kazuo Imai, Kunihiro Niigata, Takashi Fujikura, Shinichi Hashimoto, Toichi Takenaka
  • Patent number: 4217305
    Abstract: Novel phenylethanolamine derivatives represented by the formula ##STR1## wherein R represents a hydrogen atom, a halogen atom, a hydroxyl group, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, an amino group, a lower acylamino group, a lower alkylsulfonyl group, or a lower alkylsulfonylamino group; R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents hydrogen or a lower alkyl group; R.sub.5 represents an aryl group which may have a substituent, a benzodioxane ring group which may have a substituent, an aryloxy group which may have a substituent, or an arylthio group which may have a substituent; said R.sub.5 being, however, a benzodioxane ring group which may have a substituent, an aryloxy group which may have a substituent, or an arylthio group which may have a substituent when R is a hydroxyl group; and n represents 0 or an integer of 1-3 and the acid addition salts thereof.The compounds of this invention exhibit .alpha.- and .beta.
    Type: Grant
    Filed: September 27, 1978
    Date of Patent: August 12, 1980
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Kazuo Imai, Kunihiro Niigata, Takashi Fujikura, Shinichi Hashimoto, Toichi Takenaka
  • Patent number: 4127675
    Abstract: Novel indene derivatives represented by the general formula ##STR1## wherein R represents lower alkyl, phenylloweralkyl or lower cycloalkyl, and acid addition salts thereof useful as .beta.-receptor antagonists.
    Type: Grant
    Filed: October 21, 1976
    Date of Patent: November 28, 1978
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Masuo Murakami, Kiyoshi Murase, Kunihiro Niigata, Shiro Tachikawa, Toichi Takenaka
  • Patent number: 4109088
    Abstract: 2-(Indenyloxymethyl) morpholine derivatives are disclosed. These derivatives are excellent in methamphetamine stereotyped increasing and antireserpine activities which are useful as antidepression agents.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: August 22, 1978
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Masuo Murakami, Kozo Takahashi, Yuji Kawashima, Tadao Kojima, Kunihiro Niigata, Takashi Fujikura, Yoshihisa Nozaki, Shiro Tachikawa, Shinji Usuda, Soichi Kagami